CN105268077A - Electromagnetic valve - Google Patents

Abstract

A directly operated type electromagnetic control fluid switch valve has unique advantages at respects of sealing security and control security. An electromagnetic valve is specially structured as that a valve body provides a stable and compensatory sealing force; and a pushing rod of an electromagnet is of a double-section travel structure, thus to ensure that the valve can be opened under a blackout condition. The directly operated type electromagnetic control fluid switch valve comprises a valve body and an electromagnet driver installed at an outer side of the valve body, an armature of the electromagnet can move within a coil, a return spring is disposed between the armature and a housing and can enable the armature to have a tendency of breaking away from a fixed core, the pushing rod and the armature are installed together, the pushing rod can penetrate through a central hole of the armature and is slidable within the hole, the central hole of the armature is internally provided with a stage, a pushing spring can be installed inside the central hole of the armature and is limited by the stage, a first end of the pushing rod is provided with a stage and can limit the position of the pushing spring, and the stroke of the electromagnet is integrated by the stroke of the armature and the stroke of the pushing rod.

Description

Electromagnetic valve

Technical field

The present invention relates to a kind of fluid control elements, be that a kind of direct driving type electromagnetic controls fluid switching valve, be applied to fluid control systems, have particular advantages in sealingly secure, response time, control security etc., be specially adapted to gas supply system, such as respirator, anesthetic machine etc.

Background technology

In armarium, respirator is the safety that will ensure user as a kind of armarium most important condition, and under various fortuitous event appears in equipment, can ensure that user is freely ventilated all the time is the most basic safety requirements.Under the fortuitous events such as power failure, bleed pressure change over range, require electromagnetic valve to open, to ensure the autonomous respiration that patient is basic, patient can not be suffocated or other dangerous situation because machine reason produces.The patent that the existing patent No. is CN203591510 is disclosed relief valve.

The scheme that the present invention proposes is conceived to the special handling in the realization of sealing and safety of electromagnet structure and controlling party, and does from productibility angle and optimize.

Summary of the invention

The object of this invention is to provide a kind of direct driving type electromagnetic and control fluid switching valve, have particular advantages in sealingly secure, control security etc., the special construction of electric magnet is for valve body provides stable and the balanced sealing force of tool; In control, the push-off pin of electric magnet is that two-part structure ensures that, under powering-off state, valve can be opened safely.

The technical solution adopted in the present invention is: this directly operated type electromagnetic switch valve comprises valve body and is arranged on the magnet driver outside this valve body, valve body comprises valve body, valve gland, flap, and electric magnet comprises coil, shell, armature, push rod, fixed core, thrust spring, back-moving spring, snap ring; Valve body there are two passages, one of them passage has valve seat in valve body inner opening periphery, and valve gland is installed on valve body, and flap is between valve gland and valve seat, flap periphery is pressed on valve body by valve gland peripheral projection, and above-mentioned two passages and solenoid part is isolated; Coil is settled in shell, and dynamic ferrum, fixed core are through coil, and armature can be movable in coil; Back-moving spring, between armature and shell, can make armature have the trend departing from fixed core; When coil electricity, armature and fixed core are fitted, and when the coil is de-energized, back-moving spring makes armature depart from fixed core, and this forms the first stroke of electric magnet; Push rod and armature are installed together, push rod is through armature centre bore, thrust spring is installed between armature and push rod, two ends are against on the step of armature and push rod respectively, push rod can be promoted in armature centre bore, have the trend of outwards sliding, snap ring is installed on push rod one end, can limit the sliding distance of push rod in armature; The sliding scale of push rod in armature is the second stroke of electric magnet; Electric magnet is installed on valve body, and valve gland is between valve body and electric magnet; When electric magnet is energized, armature starts near fixed core, and push rod passes valve gland and flap is pressed to valve seat under the drive of armature, when flap contacts with valve seat, push rod meets obstructions, and starts to compress thrust spring and slides in armature, and now armature continues near fixed core; When armature arrives the attracted position of electric magnet setting, the push rod power acted on flap is that thrust spring applied, be far smaller than the suction-combining force of now electric magnet, not only can have ensured between flap and valve seat that positiver sealing but also the flap that excessive power can be avoided to cause and valve seat injure.

The invention has the beneficial effects as follows the electric magnet of employing two sections of strokes, ensure that the sealing force provided is stablized, can not due to the excessive injury caused valve while ensureing sealing.

Brief Description Of Drawings

Fig. 1 is structure 1 schematic diagram of the present invention

Code name 1. push rod, 2. end back-up ring, 3. armature, 4. thrust spring, 5. back-moving spring, 6. electromagnet casing, 7. coil, 8. fixed core, 9. top back-up ring, 10. valve gland in figure, 11. flaps, 12. valve seats, 13. valve bodies, 14. passage one, 15. passages two

Detailed description of the invention

This directly operated type electromagnetic switch valve comprises valve body and is arranged on the magnet driver outside this valve body, valve body comprises valve body 13, valve gland 10, flap 11, and electric magnet comprises coil 7, electromagnet casing 6, armature 3, push rod 1, fixed core 8, thrust spring 4, back-moving spring 5, end back-up ring 2, top back-up ring 9; Valve body 13 there are two passages, passage 1, passage 2 15, one of them passage has valve seat 12 in valve body 13 inner opening periphery, valve gland 10 is installed on valve body 13, flap 11 is between valve gland 10 and valve seat 12, and flap 11 periphery is pressed on valve body 13 by valve gland 10 peripheral projection; Coil 7 is settled in electromagnet casing 6, and armature 3, fixed core 8 are through coil 7, and armature 3 can be movable in coil 7 centre bore; Back-moving spring 5, between armature 3 and electromagnet casing 6, can make armature 3 have the trend departing from fixed core 8; When coil 7 is energized, armature 3 and fixed core 8 are fitted, and when coil 7 power-off, back-moving spring 5 makes armature 3 depart from fixed core 8, and this forms the first stroke of electric magnet; Push rod 1 and armature 3 are installed together, push rod 1 is through armature 3 centre bore, thrust spring 4 is installed between armature 3 and push rod 1, spring 4 two ends are against on the step of armature 3 and push rod 1 respectively, push rod 1 can be promoted in armature 3 centre bore, have the trend of outwards sliding, end back-up ring 2 is installed on push rod 1 one end, can limit the sliding distance of push rod 1 in armature 3; The sliding scale of push rod 1 in armature 3 is the second stroke of electric magnet: electric magnet is installed on valve body 13, and valve gland 10 is between valve body 13 and electric magnet; When electric magnet is energized, armature 3 starts near fixed core 8, push rod 1 passes the through hole on valve gland 10 under the drive of armature 3, flap 11 is pressed to valve seat 12, when flap 11 contacts with valve seat 12, push rod 1 meets obstructions, start slide in armature 3 and compress thrust spring 4, now armature 3 continues near fixed core 8: when armature 3 arrives the attracted position of electric magnet setting, push rod 1 power acted on flap 11 is that thrust spring 4 applied, contact sealing now due to flap 11 and valve seat 12, cut off between passage 14 and passage 15; When electric magnet power-off, electromagnetic force disappears, armature 3 starts away from fixed core 8 under the effect of back-moving spring 5 and thrust spring 4, push rod 1 slides under the effect of thrust spring 4 in armature 3, and still make the Contact of flap 11 and valve seat 12, armature 3 move to flap 11 start to depart from valve seat 12 time, push rod 1 stops sliding in armature 3, and move with armature 3 simultaneously, when top back-up ring 9 touches electromagnet casing 6, armature 3 and push rod 1 stop motion, be communicated with between passage 14 and passage 15.

Claims (3)

1. a Direct Action Type diaphragm valve, comprises valve body and is arranged on the electric magnet outside this valve body; Valve body comprises valve body, valve gland, flap; Electric magnet comprises coil, electromagnet casing, armature, push rod, fixed core, thrust spring, back-moving spring, the first locating part, the second locating part; Valve body there are first passage and second channel, have valve seat in the open circumferential of first passage inside valve body; Valve gland is installed on valve body, and flap is between valve gland and valve seat, and flap periphery is pressed on valve body by valve gland peripheral projection; Coil is settled in electromagnet casing, and dynamic ferrum, fixed core are through coil, and armature can slide in coil; Back-moving spring, between armature and fixed core, can make armature have the trend departing from fixed core; When coil electricity, armature and fixed core attracting, armature arrive primary importance, when the coil is de-energized, back-moving spring make armature depart from fixed core, due to locating part exist armature arrive the second position; Push rod and armature are installed together, push rod is through armature centre bore, thrust spring is installed between armature and push rod, two ends are against on the step of armature and push rod first end respectively, push rod can be promoted in armature centre bore, have the trend of outwards sliding, first locating part is installed on the projection of push rod first end through armature, the sliding distance of push rod in armature can be limited: push rod second end arrives opposite side through fixed core, second locating part is installed on push rod second end and protrudes fixed core part, can limit the shift length of armature; Electric magnet is installed on valve body, and valve gland is between valve body and electric magnet; When electric magnet is energized, armature starts near fixed core, and push rod passes valve gland and flap is pressed to valve seat under the drive of armature, when flap contacts with valve seat, push rod meets obstructions, and starts to compress thrust spring and slides in armature, and now armature continues near fixed core; When armature arrives primary importance, the power of thrust spring acts on flap by push rod, flap is contacted with valve seat and seals, and first passage and second channel cut off; When electric magnet power-off, electromagnetic force disappears, armature starts away from fixed core under the effect of back-moving spring and thrust spring, push rod slides under the effect of thrust spring in armature, and still make the Contact of flap and valve seat, when armature moves to the second position, flap and valve seat depart from, and are communicated with between first passage and second channel.

2. electric magnet according to claim 1, is characterized in that armature and fixed core have centre bore, and push rod can pass above-mentioned centre bore, and can slide in hole.

3. electric magnet according to claim 1, it is characterized in that there is step in armature centre bore, thrust spring can be arranged on centre bore inside, and spacing by step, and push rod first end has step, and can the position of limit thrust spring.